With whom did Snape invent his curses? (was: When did Snape invent his curses?)

[Hannah]

No: HPFGUIDX 133464

 "grega126"  wrote:
> The thing that's been bugging me about this whole him inventing 
these 
> curses thing, is how did James learn a non-verbal spell that Snape 
had 
> created.  Remus says that the curse was quite the fad when they were 
in 
> school.  So if Snape inveneted it, someone else would've had to have 
> also created it independent of Snape, OR Snape didn't actually 
invent 
> them, but he just wrote them down in his book.

Hannah:  
Well, we are assuming that Snape acted alone when he invented his 
curses and Potions improvements.  I wonder if he did.  That's not to 
say they weren't largely his inventions, but Snape craves glory and 
attention - I bet he bragged about them to his friends.  This may have 
been the gang of Slytherins, or perhaps it was other members of the 
Slug-Club.  Like Lily Evans.

Slughorn describes Lily as a creative and instinctive Potions maker, 
whereas Snape strikes as more of a Hermione type 'if it's not in the 
book...!' Perhaps the spells were Snape's, the Potions improvements 
Lily's, and the two shared their discoveries with each other.  Maybe 
Lily let slip some of Snape's curses to her Gryffindor friends, hence 
his very angry reaction in the pensieve scene.  She was defending him 
from curses that Potter would never have known to use if she hadn't 
blabbed them.  

Presumably they made up for a while at least, in which time Snape made 
his annotated book, including Lily's new Potions discoveries as well 
as his own.

Of course, it's only a possibility, but I really like this theory.  It 
all ties in with the 'something huge' about Lily, and what we've been 
told about her being brilliant at Charms and Potions.
Hannah